John von der kammer



(N0 Model.)

J. VON DER KAMMER. INCANDBSOENT LAMP.

N0. 492,809. Patented Mann 7, 1893.

UNI1E'I) STATES PATENT OFFICEQ JOHN VON DER KAMMER, OF CHICAGO, ILLINOIS.

INCANDESCENT LAM P.

SPECIFICA'IION forming part of Letters Patent N0.492809 dated March '7, 1893.

Application filed January 23, 1893. Serial N0. 459444. (N0 moel.)

T0 all wlwm it may c0ncern:

Be it known that I, J OHN VON DER KAM- MER, a subjeotof the Emperor of Germany, residing at Chicago, Cool; oounty,lllinois,have invented a new ancl useful Improvement in Incandescent Lamps, 0f which the following is a speeification.

My invention relates to inoancleseent la1nps, and has f01 its objeot to provide certain new and useful lmprovements in inoandesoent lamps, an Cl partionlarly 130 provide means whereby a 1110SL economical lamp oan be made; and whereby tl1o use of conducrors passing tlnough tl1e glass can be avoided, ancl Whereby the 1ong inleading wires oon1monly ernployed may loe dispensed with so as to avoid among other things tl1e diffioulties and ClangelS incident t0 sealing the wires in alonp; their lengths; and to avoid bends,eurves and the like, at or about tl1o base of the lamp, so as t0 make it easy to Use heat about tl1e base 0f tho lamp f0r repairs and tl1e like without endangering the lamp; ancl to provide a receiver 01' bulb made in part 0E 1netal, and in part 0f glass, and to aceomplish other objects and results hereinafter more fully set forth and specified. Where inleading wires are .nsed, mucl1 cliflieulty is experienoed with them as is set forth in various patents and otherwriv ings relating t0 the subject In su'cl1 cases, the inleading Wi1e must pass throngh a cousiderable length 0f glass, 01' be surrouuded by aud fuse into glass along a considerable portiou of its length in orcler to make a tight seal. Thi5, 0f course, involves having Considerable masses o1 portions of glass ab tl1e base 0f tho lamp, through which such wires can extencl; All this is unsatisfactory, and leads to many disadvantages, not here necessary to enumerate. These leading in wires and conduotors whicl1 pass through l l1e glass are made 0f platinum,a high-prieecl metal, and in this shape, thab is 0f oonduotors leading through the glass 01 platinum concluctors, lt is very diflioult, if not impossible, t0 recover such meta1 for suocessive use, and when recovered, it must be refined, and again drawn int0 wire, whioh involves loss, expense and cleterioration 0f tl1e metal. It is therefore an important part of my invention t0 substituto for theso small inleacling wires and conduotors passing tl1rough t-he glass comparatively large masses 01 plates of motal, whieh forma portion of oho globe 01 receiver, beingsooured thereto onlyalongtheir edges, sothat tl1e metal oan be recoverecl in the form of such plates or masses again ancl again without being refined. aucl henoo without loss or deterioration. These shoets 0f platinum 01 plates 0f platinum are shaped and applied ab the base of the receiver 01 globe in such rnanner t0 enable me to dispense with the seal pieces, stems glass tubes and glass wire supports coxnmonly ernployed, and it also dispenses with be inwardly projecting portions of glass and the like injurious 01' disadvautageous features and devices connnonly found in inoandescent lamps. This use of the metallic base also enables 1ne to dispense with the llfficult and dangerous process 0f sealing or fusing glass upon glass, as in the ordinary fonn of coustrueting an incandescenu lamp, for whero this process is followed out 113 frequently occurs that the two portions of glass brought together t0 be fused will have iuterposed between thom foreign substances which render a good seal diffioult, and involve a certaiu percentage of loss of la1nps in the process of manufaoture. 'lhe sealing of tl1e metal base upon 01 into the glass globe I have found makes it easy to obtain a safe and satisfaetory wwuum bulb for the reason thab 1he glass being brought around 0x 0ver the edge 0f the disk 01 base plate which forms a part of the bulb 01 reeoiver may bo fused there 011 tl1e metal so as to f011n a safe Saal.

I have shown a number of modifications 0f my invennion, the use andoperation ofwhiol1 may be readily understood.

My invention is illustrated in tho aceompanying drawings, whorein:

Figure 1 is a side view part seotional 0f a lamp eontaining the metal base portion of Ehe bulb 01 globe. Fig. 2 is a botton1 view 0f the bulb Witl1 wires attaohed. Fig. 3 is a horizontal section on the line 8, 3 looking downwardly. Fig.4 is a side view 0f the bottom plate and theoharglngxbeon whiohit is fixed, and the filamont. Fig. 5 is aplan view 0f Same with filament removed. Fig. 6 is a plan view of the base place punched out ready for use. Fig. 7 is a side flew of a modification 0f tho base platean attaohed parts. Fig. 8 is a plan view 0f such modified base plate. Fig.

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9 is a side clevation 0f the device shown in Fig. 4. Fig. 10 is a view of the lamp bulb eompleted With the exterior wires removed.

Like parts are indicatecl by the sameletter in all the figures.

A is a bulb formeclin part of glass, und in part 0f metal. The lower metallic portion 01 base B is preferably clivided into two parts, as indicatecl in various diagram3. I1; may have tw0 upwarclly projecting terxninal strips C O, t0 which the enclsof the filamentD may be attached. The base plate B an(l the arms C O are preferably stampcd out in a single base plate, but When applied to the lan1p, these tw0 portions are separated.

E is a hole 01 aperture tlnough the plale. The base plate may be securcd upon tl1e Tube F 01 stem G, according t0 the manner in which in is t0 be applied to the laxnp. If the tube F is employecl, the laxnp globe may be (lischarged 01 chargecl 01 both throughsueh tube; buL if the stem is employed, the charging and discharging xnay take place through the top of the gl0be as at H. When the tube is used, after the lamp is completed, lt is fused off a s ab F.

J J me the exterior wires, which may lcad cach [0 one of the portions 0f the metallie base, though of course any s0rt of conncction can be made with such platcs, as by the use 0f springs o1 other clements 01: fcatures 0f the finishing base.

I (10 n0t dwell furthe1 upon the finishing base ancl parts necessary [0 bring the current to the lamp, since they a1e capable 0f wide variation without cleparling fron1 the, spiriL 0f 1ny iuvention.

I prefer t0 charge In lan1p 0x globe Will] a suitable elen1ent, substance 01 gas, though of course, the featurcs of construction here shown 1nay be employed in conncction with an exhaustion 01 vacuum globe.

'lhe metal sheets are substantially at right angles to tl1e glass portion 0f the rcceiver wall at the point where they are fuse(l together.

The metal plate 01 plates 0f the base 0f the lzunp may be understood by an inspection 0f the clrawings. The base in its prefer1ed f01n1 is composed 0f two substantially equal parts cf 1netal connccted hy the glass pieees 01 portions S S. The whole is 1neunte(l upon a glass sten1 er tubc. 'lhis base so formed is inserted in the lower slightly prolongecl encl 0f the receiver and is of such sizeasto fit snugly Will]- in such rcceiver. The lowcr end of the receiver is then fused against the edge 0f the base which is ahnost at right angles t0 the innen surface 0f the recciver, und Lhe lower portion of the receiver is fnsecl arouncl tl1e edge so as to extend 011 to the Guter surface 0f the 1netal 0f the base. Conduetors may be employed being led through apercures in the base plate, the base plate in (hat easc forn1ing one continuous 1netallic portion, and the conduct- 0rs leading therethrough being surrounded thcrein by glass tubes 01 portions R, R. \Vhen the base is composed of tw0 01 n10re separatecl sheets, 1netallic conductors might be led through such portions caeh fused upon a 1netal sheet;the sl1eet metal 0f course is preferably composed 0f platinuxn. \Vhen the plate metal is to be recovered, the glass porti0n may be broken off neun t0 the edge of the metal, the base part may then be heated and dipped in water when the glass will separate from the metal, and the metal plates will be ready for use. The filan1ent und the exterior conductor 01 wire may be connected with the metal plates in any desirecl manner.

In Fig. 1 I show a lan1p which has been exhausted f10n1 the bottom, und in Fig. 10 a lan1p which has been exhausted fron1 the top, and in either case the fluicl inserted is int1o- (luced a1: the point 0f exhaustion. \Vhen a metal base is usecl with conduetors which pass through the same und through bits of glass 01 the like embedded in such plate 01 n1etal base, the n1etal base may be 0f a Single sheet o1 plate; but if the concluctors are in metallic contact with such plates, tl1en the pl-ate should be dividecl into tw0 parts as indicatecl in son1e 0f Lhe figures.

I elaim l. In an incandeseent lamp, thc combination of a receiver er globe having its Walls of glass and base composed partly 0f glass ancl partly 0f metal, With an exhaust am]. eharging tube passing through such n1eta-l base and opening into the receiver.

2. In an incandcscent lamp, the combination 0f a filament anal conductors wi th a recciver 01' bulb, whose Walls are composed in part of glass und part 0f metal, the glass portions fuse(l upon the u1etal substantially a1; right angle thereto and upon tl1e outer surfaee 0nly 0f the n1etal part-.

3. In an incandescent lanxp the coxnbinati0n of a substantially flat 1netallie base composecl 0f two porlions in the same plane 0011- nectecl by a bridge of glass 01' the like t0 Iorn1 a Hat continuous base wiLh a glass portlon rising fro1n about the eclge 0f said base fused up0n the e(lge and outer surface only of such base und f0rnuing therewith a receiver 01' globe, With a filament supportecl upon such 1netallie base and conductors leading to 01' through such metallic base.

In an incandescent lamp, the combination of a receiver 1nade partly of glass und partly 0f sheets 0f 1netal, said sheets at the base 01": the lan1p, a earbon filament wibhin the receiver, concluctors leading the current to the sheets in the base 0f the lan1p and up wardly baut portions of the 1netal shcets L0 each of which one end of the filament is secured.

JOHN VON DER KAMMER.

Winesses:

FRANOES W. PARKER, EMMA ELLIOTT.

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